Home / 3,907.78-5,391.87-2,228.71

Finding the Fourth Proportional to 3,907.78, 5,391.87 and 2,228.71

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Solution

The fourth proportional to 3,907.78, 5,391.87 and 2,228.71 is: 3,075.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.78 : 5,391.87 = 2,228.71 : x
  2. Step 2: Convert to fraction form
    3,907.78/5,391.87 = 2,228.71/x
  3. Step 3: Cross multiply
    3,907.78x = 5,391.87 × 2,228.71
  4. Step 4: Simplify right side
    3,907.78x = 12,016,914.59
  5. Step 5: Solve for x
    x = 12,016,914.59/3,907.78
  6. Step 6: Final answer
    x = 3,075.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.